<template>
  <div class="dashboard-editor-container">
    <el-row>
      <el-col :span="5">
        <el-row class="panel-group">
          <el-col class="card-panel-col">
            <div class="card-panel" @click="handleSetLineChartData('newVisitis')">
              <div class="card-panel-icon-wrapper icon-people">
                <svg-icon icon-class="peoples" class-name="card-panel-icon" />
              </div>
              <div class="card-panel-description">
                <div class="card-panel-text">用户数量</div>
                <count-to :start-val="0" :end-val="userCount" :duration="2600" class="card-panel-num" />
              </div>
            </div>
          </el-col>
        </el-row>
        <el-row class="panel-group">
          <el-col class="card-panel-col">
            <div class="card-panel" @click="handleSetLineChartData('messages')">
              <div class="card-panel-icon-wrapper icon-message">
                <svg-icon icon-class="message" class-name="card-panel-icon" />
              </div>
              <div class="card-panel-description">
                <div class="card-panel-text">图书总数</div>
                <count-to
                  :start-val="0"
                  :end-val="bookCount"
                  :duration="3000"
                  class="card-panel-num"
                />
              </div>
            </div>
          </el-col>
        </el-row>
      </el-col>
      <el-col :span="16">
        <div id="borrowChart" class="chart" style="height: 350px; padding: 20px; padding-left: 80px"/>
      </el-col>
    </el-row>
    <el-row>
      <el-col :span="10">
        <div id="outTimeChart" class="chart" style="height: 400px; padding: 30px"/>
      </el-col>
      <el-col :span="11">
        <div id="majorAndAgeChart" class="chart" style="height: 400px; padding: 30px"/>
      </el-col>
    </el-row>
  </div>
</template>

<script>
import { getHome } from '@/api/dashboard'
import CountTo from 'vue-count-to'
var echarts = require('echarts')
export default {
  components: {
    CountTo
  },
  data() {
    return {
      bookCount: 0,
      userCount: 0
    }
  },
  created() {
    this.getData()
  },
  methods: {
    // 初始化首页
    getData() {
      getHome().then(res => {
        this.getBorrowChart(res.data.data.daysBorrow)
        this.getOutTimeChart(res.data.data.daysOutTime)
        this.getMajorAndAgeChart(res.data.data.major, res.data.data.age)
        this.userCount = res.data.data.userCount
        this.bookCount = res.data.data.bookCount
      })
    },
    // 获取借阅条形图
    getBorrowChart(daysBorrow) {
      const borrowChart = echarts.init(document.getElementById('borrowChart'))
      borrowChart.setOption({
        title: { text: '前7日借阅数' },
        legend: {
          data: ['借阅数'],
          right: 1
        },
        yAxis: [
          {
            name: '借阅数',
            type: 'value',
            axisLine: {
              show: false
            },
            axisTick: {
              show: false
            },
            axisLabel: {
              color: '#666',
              fontSize: 12
            }
          }
        ],
        xAxis: {
          axisTick: {
            show: false
          },
          axisLabel: {
            color: '#666',
            fontSize: 12,
            margin: 12
          },
          data: daysBorrow[0]
        },
        series: [
          {
            name: '借阅数',
            yAxisIndex: 0,
            data: daysBorrow[1],
            type: 'bar',
            color: '#00B5FF',
            barWidth: 30
          }
        ]
      })
    },
    // 7日超时还书人数曲线图
    getOutTimeChart(daysOutTime) {
      const outTimeChart = echarts.init(document.getElementById('outTimeChart'))
      outTimeChart.setOption({
        title: { text: '7日超时还书人数' },
        legend: {
          data: ['人数'],
          right: 1
        },
        yAxis: [
          {
            name: '超时还书人数/个',
            type: 'value',
            axisLine: {
              show: false
            },
            axisTick: {
              show: false
            },
            axisLabel: {
              color: '#666',
              fontSize: 12
            }
          }
        ],
        xAxis: {
          axisTick: {
            show: false
          },
          axisLabel: {
            color: '#666',
            fontSize: 12,
            margin: 12
          },
          data: daysOutTime[0]
        },
        series: [
          {
            name: '人数',
            yAxisIndex: 0,
            data: daysOutTime[1],
            type: 'line',
            color: '#20B2AA'
          }
        ]
      })
    },
    // 饼图
    getMajorAndAgeChart(major, age) {
      const majorAndAgeChart = echarts.init(document.getElementById('majorAndAgeChart'))
      var n = 0
      majorAndAgeChart.on('legendselectchanged', params => {
        if (n % 2 === 0) {
          majorAndAgeChart.setOption({
            legend: {
              data: ['用户专业', '用户年龄'],
              right: 1,
              color: '#20B2AA',
              selected: {
                '用户专业': false,
                '用户年龄': true
              }
            },
            series: [
              {
                type: 'pie',
                name: '用户专业',
                data: major,
                label: {
                  position: 'outer',
                  align: 'labelLine',
                  bleedMargin: 5
                }
              },
              {
                type: 'pie',
                name: '用户年龄',
                data: age,
                label: {
                  position: 'outer',
                  align: 'labelLine',
                  bleedMargin: 5
                }
              }
            ]
          })
        } else {
          majorAndAgeChart.setOption({
            legend: {
              data: ['用户专业', '用户年龄'],
              right: 1,
              color: '#20B2AA',
              selected: {
                '用户专业': true,
                '用户年龄': false
              }
            },
            series: [
              {
                type: 'pie',
                name: '用户专业',
                data: major,
                label: {
                  position: 'outer',
                  align: 'labelLine',
                  bleedMargin: 5
                }
              },
              {
                type: 'pie',
                name: '用户年龄',
                data: age,
                label: {
                  position: 'outer',
                  align: 'labelLine',
                  bleedMargin: 5
                }
              }
            ]
          })
        }
        n = n + 1
      })
      majorAndAgeChart.setOption({
        legend: {
          data: ['用户专业', '用户年龄'],
          right: 1,
          color: '#20B2AA',
          selected: {
            '用户专业': true,
            '用户年龄': false
          }
        },
        series: [
          {
            type: 'pie',
            name: '用户专业',
            data: major,
            label: {
              position: 'outer',
              align: 'labelLine',
              bleedMargin: 5
            }
          },
          {
            type: 'pie',
            name: '用户年龄',
            data: age,
            label: {
              position: 'outer',
              align: 'labelLine',
              bleedMargin: 5
            }
          }
        ]
      })
    },
    handleSetLineChartData(type) {
      this.$emit('handleSetLineChartData', type)
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
.dashboard-editor-container {
  padding: 32px;
  background-color: rgb(240, 242, 245);
  .chart-wrapper {
    background: #fff;
    padding: 16px 16px 0;
    margin-bottom: 32px;
  }
}

.panel-group {
  margin-top: 18px;
  padding-left: 30px;

  .card-panel-col {
    margin-bottom: 32px;
  }
  .card-panel {
    height: 108px;
    cursor: pointer;
    font-size: 12px;
    position: relative;
    overflow: hidden;
    color: #666;
    background: #fff;
    box-shadow: 4px 4px 40px rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.05);
    &:hover {
      .card-panel-icon-wrapper {
        color: #fff;
      }
      .icon-people {
        background: #40c9c6;
      }
      .icon-message {
        background: #36a3f7;
      }
      .icon-money {
        background: #f4516c;
      }
      .icon-shoppingCard {
        background: #34bfa3;
      }
    }
    .icon-people {
      color: #40c9c6;
    }
    .icon-message {
      color: #36a3f7;
    }
    .icon-money {
      color: #f4516c;
    }
    .icon-shoppingCard {
      color: #34bfa3;
    }
    .card-panel-icon-wrapper {
      float: left;
      margin: 14px 0 0 14px;
      padding: 16px;
      transition: all 0.38s ease-out;
      border-radius: 6px;
    }
    .card-panel-icon {
      float: left;
      font-size: 48px;
    }
    .card-panel-description {
      float: right;
      font-weight: bold;
      margin: 26px;
      margin-left: 0px;
      .card-panel-text {
        line-height: 18px;
        color: rgba(0, 0, 0, 0.45);
        font-size: 16px;
        margin-bottom: 12px;
      }
      .card-panel-num {
        font-size: 20px;
      }
    }
  }
}
</style>
